Protector rod for looms



Dec. 6, 1949 w. A. BLANCHARD 2,490,403

PROIEQTOR non FOR LOOMS Filed Aug. 17, 1948 INVENTOR WILLIAM A. BLANGHARD ATTORNEY Patented Dec. 6, 1949 PROTECTOR ROD F'ORcLOOMSv WilliamA. Blanchard, Millbury, Mass., assig'nor' to 'Crompton & Knowles Loom. Works, Worcester, Mass, a corporation ofjMassachusetts Application August 17, 1948', ScrialNd. 44;1105

6 Claims. 1

This invention relates to improvements in protector mechanism for a loom and it is the general object of the invention to provide an improved protector rod.

Looms are ordinarily provided with some means for arresting weaving operations if the shuttle fails to be boxed at a given time in the loom cycle; Many of these mechanisms include a la'ycarried protector rod having daggers for engagement with stopping mechanism. When the shuttle" is properly boxed the shuttle binder exerts a force on a protector finger secured to the rod to rock the latter and. thereby move the dagger out of registry with the stopping mechanism. Upon failure of the shuttle to be boxed or to emerge from the warp shed at the correct time inv the loom cycle the lay moves the dagger againstthe stop mechanism to stop the loom. As made heretofore the protector rod has been a relatively expensive item in loom construction due largely to the fact that the rod has been made of a single elongated piece of metal to which the daggers are welded at distances along therod corresponding to particular widths of looms.

It is an important object of the present invention to provide dagger units of improved construction' which can be produced inadvance and independently of the width of the looms on which they are ultimately used and subsequently welded to an intermediate rod section the length of which is determined by the width of the particular loom on which the assembled rod is to be used.

It is a further object of the invention to provide a protector rod or unit therefor including two axially aligned rod members held together by a coupling member or the like on which are mounted a number of relatively thin dagger forming elements. The latter are formed with non-circular holes to fit a non-circular part of the coupling member lying between adjacent ends of the rod members, and after the several parts are assembled they are subjected to some form ofv brazing or the like which in effect into-- grates them.

It is a more particular object of the invention to provide the aforesaid coupling member with screw threaded shanks to fit into screw threaded holes in the rod members after a series or set of dagger forming elements have been mounted on the intermediate part of the coupling: member between the screw threaded shanks thereof. By reason of the screw threads it is possible to establish a tight assemblage of the parts, after 2 which theymay be brazed as already mentioned.

With, these: and other objeots-- inview which will appear as thedescriptionproceeds, the invention resides-in'the combination andarrangement of parts hereinafter described. and setforth.

In the accompanying drawings,- wherein a convenient embodiment of the invention is set forth,

Fig.1 shows. aside elevation of parts of a loom having the invention. applied thereto; the breast beam, lay, shuttle box andpartof the protector rod being. shown in section,

Fig.. 2 is an exploded perspective view of the several parts forming" aprotector rod unit prior to assembly, and

Fig; 3 is a plan view of'a complete protector rod with the dagger units securedto an intermediate rod section.-

Referring particularly to. Fig. 1, the loom frame In supports a lay I-l mounted on swords one. of which isi-nd-icated-at $2. The lay is prcvidedwith the shuttle boxl3. which inthe presentinstance'has a: box back I 4.- secured to the'lay and a movable: shuttle binder I-5'form-ing the front part of the shuttle box. The shuttles is picked back and forth across the m and is ordinarily boxed during forward movement of the lay at such atime in the cycle of loom operations that the shuttle- Wi1l-be out of the warp shed designatedat W; If.,. however, the shuttle should be tardy in itswarrival at the shuttle box allorpart of it. may extend into the: warp shed and if prompt loom stoppage-is not effected under these conditions many of the warp threads will be broken.

Mounted on. the under sideof the breast beam z lof the loom is a lever 21 associated in known manner. with loom: stopping mechanism and ef-= fective when moved forwardly during forward.

motion of the lay. to stop the latter abruptly. The means for operatingvthe stopping lever H includes a. protector rod designated herein generally at- P and including an upright finger 22 secured to a-rod-2-3 for engagement with thebinder I5. A'dagger 25 is-alsorigid with therod 23 and meansrnot shown-herein but generally com-- prising a torsion spring around the rod. 23 normally lifts the dagger so that the lay during its forward movement will cause engagement of the dagger and the lever 24- ifv there is no shuttle in the shuttle box. If, however;v the shuttle is boxed on' time the dagger: will be" moved downwardly to clear;- thelever 2| as the lay, moves toward: front center; or to the-le'ft as viewedirr Fig.- 1.. The leg is provided with bearingsrforrod 23 one of which is shown at 24' in Fig. 1.

Except for the details of the protector rod P to be set forth hereinafter the mechanism already described is of usual construction and operates in the ordinary manner.

Referring particularly to Figs. 2 and 3, wherein the protector rod is set forth in greater detail, it will be seen that the previously described rod 23 in effect comprises several coaxial members one of which is an intermediate section 30 connected at the opposite ends thereof to dagger units which are set forth herein as UI and U2. Since these units are alike only one of them is set forth in detail, namely, the unit Ul at the right end of the protector rod shown in Fig. 3.

Referring particularly to Fig. 2, the unit UI includes right and left protector rod members 35 and 36, respectively. The member 35 has a bore 31 therein provided with internal screw threads, and in similar manner the member 36 has a screw threaded bore 38. These bores are preferably coaxial with their respective rod members and may either be both of the same hand or opposite hands. The end 39 of each member 35 and 36 adjacent to the threaded bore is fiat and preferably perpendicular to the axis of the associated rod member.

A coupling member designated at 40 comprises an intermediate part 4| which as shown herein is substantially of square cross section. Extending in opposite direct ons from part 4| are coaxial shanks 42 and 43 provided with screw threads to fit the screw threads of the bores 31 and 38, respectively. A plurality of relatively thin flat dagger forming elements 45 are provided as shown more particularly in Fig. 2, each of these elements having a flat body w th an operating end or point 46 at one end thereof and a non-circular opening 41 in the other end thereof proportioned to fit the intermediate part or section 4| of the coupling member 40. There will be enough of these flat dagger elements so that when assembled in close order they will embrace substantially the full length of the intermediate section 4|.

After the parts are provided as set forth in Fig. 2 the dagger elements will be assembled on the section 4| of the coupling member with their operating points 46 in alignment and with their The dagger units may be prepared in large numbers in advance of their actual use on particular looms and stored for future use. When a protector rod is to be made for a loom of a given width two of the units can be united to the intermediate protector rod section 30 as by Welding indicated at 5B. The length of the section 30 will be determined by the width of the loom. When thus made the rod can be applied to the lay in the usual manner, the protector fingers 22 being secured to the rod either before or after the Welding operation depending upon Whether they are to be between the two daggers or between the latter and the ends of the protector rod 23.

From the foregoing it will be seen that the invention sets forth simple means for providing a protector rod made of similar dagger units which are united as by welding or the like to an intermediate protector rod section so that the dagger units can be made in large numbers in advance of their actual use and without reference to the width of the looms on which they are ultimately used. It will also be seen that the dagger is made of a number of flat strips which can be formed by a cheap punching operation and that these elements are assembled on a coupling member which can be readily produced automatically as a screw machine product. Furthermore, the faces 39 of the rod members and 3'5 are united to the outer surfaces of the adjacent dagger elements in the brazing operation so that the coupling member is not required to withstand all of the strain to which the protector rod is abruptly subjected when the loom must be stopped due to failure of the shuttle to box properly. By the integration or uniting of the several parts of the rod unit, particularly the coupling unit and the dagger members, a strong unit can be made from parts which are cheap and easily produced.

Having thus described the invention it will be seen that changes and modifications of the foregoing specific disclosure may be made without departing from the spirit and scope of the invenholes or perforations 41, which may be square,

establ'shing a fairly tight fit with the intermediate section 4| of the coupling member. The rod members 35 and 36 are then threaded tightly enough on their corresponding screw threaded shanks 42 and 43 to cause the flat surfaces 39 to hold the dagger elements in close order on the coupling member. This fit may be established by having the intermediate coupling member section 4| slightly less in length than the combined width of the dagger elements, although this is not a necessary relation. It will be desirable however that the parts be so proportioned that they can be assembled in close fitting relation with each other on the coupling member with the rod members 35 and 36 either engaging or very closely adjacent to the outermost of the dagger elements. v

The parts thus assembled are then placed in a furnace and brazed by an operation in which the bonding or brazing metal, such as copper or a silver alloy, flows into the spaces between the coupling member and the parts of the dagger elements and rod elements 35 and 3B closely adjacent thereto. The effect of this brazing is to unite all of the parts shown in Fig. 2 into a single dagger unit.

'tion.

What is claimed as new is:

1. In a dagger unit for a m protector rod, a pair of axially aligned rod members, a coupling member located between and extending into said rod members and formed with an intermediate section between the rod members, and a plurality of fiat dagger forming elements having perforations fitting said intermediate section and located between said rod members, all of said parts of shanks threaded into the bores of said rod members, said coupling member having an intermediate section between said shanks, and a plurality of aligned dagger elements mounted on said intermediate section between said rod members, the rod and coupling members and dagger elements being united by a bonding metal.

3. In a dagger unit for a loom protector rod, a pair of aligned rod members each having a screw threaded bore therein, a coupling member having oppositely extending screw threaded shanks threaded into the bores of said rod members, said coupling member having an intermediate section of non-circular cross section between said shanks, and a plurality of dagger elements each formed with an operating point at one end and a non-circular perforation in the other end thereof to fit said intermediate section of the coupling member, said elements being arranged with said intermediate section in said perforations and the operating points aligned, the rod and coupling members and dagger elements being united by a bonding metal.

4. In a dagger unit for a loom protector rod, a pair of aligned rod members each having a screw threaded bore therein, a coupling member having oppositely extending screw threaded shanks threaded into the bores of said rod members, said coupling members having an intermediate section of non-circular cross section between said shanks, and a plurality of dagger elements each formed with an operating point at one end and a non-circular perforation in the other end thereof to fit said intermediate section of the coupling member, said elements being arranged With said intermediate section in said perforations and the operating points aligned, the overall width of the dagger elements being slightly greater than the length of said intermediate section and those parts of the dagger elements surrounding said intermediate section being held together in close order by reason of the red members being threaded tightly on their respective threaded shanks, the members and elements of said dagger unit being held together by a bonding metal.

5. In a loom protector rod, a pair of axially aligned rod members, a coupling member located between and extending into said rod members and formed with an intermediate section between the rod members, and a plurality of fiat dagger forming elements having perforations fitting said intermediate section and located between said rod members, all of said parts of the unit being united by a bonded metal.

6. In a loom protector rod having an intermediate rod section and a dagger unit secured to each end of the rod section, each dagger unit comprising a pair of axially aligned rod members, a coupling member located between and extend ing into said rod members and formed with an intermediate section between the rod members, and a plurality of fiat dagger forming elements having perforations fitting said intermediate section and located between said rod members, all of said parts of the unit being united by a bonding metal.

' WILLIAM A. BLANCHARD.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Name Date Tarte July 27, 1943 Number 

